Read Buffer Command (3Ch) - HP 2600fx - Optical Disk Drive Command Reference Manual

Table 2-90
SCSI-2 Drive Command Set

Read Buffer Command (3CH)

Read Buffer Command (3CH)
This command reads data from the drive data buffer. The transfer data
consists of a 4-byte descriptor followed by the buffer data.
Read Buffer Command CDB
Byte 7
0
1 Logical Unit Number
(0)
2
3
4
5
6
7
8
9
Mode Indicates which data format is to be used. Refer to
Table 2-91 on page 2-103 for valid values.
Buffer ID Indicates which buffer is to be used. Refer to Table 2-91
on page 2-103 for valid values.
Buffer Offset Indicates at what address the data should be written,
offset from the beginning of the buffer.
Parameter List
Length Indicates the number of data bytes to be read from the
buffer.
2-102
6 5 4
Operation Code (3CH)
Reserved (0)
Buffer ID
Buffer Offset (MSByte)
Buffer Offset
Buffer Offset (LSByte)
Parameter List Length (MSByte)
Parameter List Length
Parameter List Length (LSByte)
Reserved (0)
3 2 1
Mode
Flag
Chapter 2
0
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